OSRS Drop Calculator › Rat bone

Best way to farm Rat bone

All 5 monsters that drop Rat bone, ranked by realistic quantity per hour — not just drop rate. Change the seconds-per-kill for any monster to match your own speed.

Drop data: Rat bone on the OSRS Wiki

Currently fastest method
Rat (Regular)
300 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Rat (Regular)
Combat lvl 1
1/4 · 1
 0.25 3 1,200 300
Rat (Stronghold of Security)
Combat lvl 1
1/4 · 1
 0.25 3 1,200 300
Giant rat (Level 26)
1/4 · 1
 0.25 8 450 112
Crypt rat
Combat lvl 43
1/4 · 1
 0.25 10 360 90
Brine rat
Combat lvl 70 · Slayer 47
1/4 · 1
 0.25 13 277 69
How this is calculated: items/hr = (3600 ÷ seconds per kill) × average items per kill. Each monster's drop lines are listed as the wiki shows them (rarity · quantity); the average adds them all up, each as rarity × average quantity × rolls — so a guaranteed drop plus a rarer bonus drop both count. Drop rates and quantities come from the OSRS Wiki's community-verified drop tables. Seconds-per-kill is an editable estimate based on each monster's hitpoints and defence — your real speed depends on your stats and gear, so adjust it and your edits are remembered on this device. Rates marked ~ are approximate on the wiki.